I'm not sure about this but this is what I think about JD fluid. The MSDS says there is no heptane. This is good. There might be some heavy hydrotreated something or another upper cylinder lubricant(oil). That's fine too as it isn't much. The propellant is CO2. I'm not sure if CO2 dissolves in ether the way it does in water but that might be what you saw.

Diethyl ether is diethyl ether so there isn't a "more volatile" version of it. But ether does boil at 94°F. Add in your altitude and carb suction and that will decrease. So it might be that it was just boiling.